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Objectives and Activities

ARKI (Arctic Offshore Structures) is a domestic study pursuing research on ice engineering technology that was started at VTT twenty years ago. The project is financed by the National Technology Agency of Finland (TEKES), the Finnish Maritime Administration, the Finnish Road Administration and the Technical Research Centre of Finland (VTT). The project supports VTT's participation in international co-operation on ice engineering research. The objectives include transfer of the state-of-the-art information for Finnish companies developing marine structures for ice-bound waters. A material model has been developed for the numerical simulation of  the ice failure processes (See Publications).

LOLEIF (Validation of Low Level Ice Forces on Coastal Structures) is an EU funded research project, where eight European institutes conducted experimental and theoretical studies on ice forces acting on vertical offshore structures. Full-scale experiments were carried out in the Gulf of Bothnia in 1999-2000. Ice forces were measured at the Norstömsgrund lighthouse offshore Luleå in Sweden. In addition, ice strength characteristics of first-year ice ridges were measured close to Oulu in Finland. Public-domain information is available in LOLEIF web-pages and in the Publications-page.

STRICE (Measurements on Structures in Ice) is a follow-up study for the LOLEIF project. Pre-normative research was carried out by continuing full-scale measurements in the Gulf of Bothnia in 2001-2003. The full-scale data will be released for publicity in 2009. Public-domain information is available in STRICE web-pages and in the Publications-page.

COSAR (Choise of Arctic Offshore Structures) and INTAS 97-1665 (Reliability of Engineering Facilities in the Arctic Seas) were two subsequent research projects funded by INTAS. VTT co-ordinated the work of five institutes from Norway, Russia and Ukraine to improve models that are used to determine ice loads on Arctic Offshore structures. Basic information on these projects as well as selected papers are available in the INTAS Publications-page.

NEST (Networking Studies on Ice and Compliant Structures) is an EU funded network project to stimulate co-operation and to change information between European and Chinese researchers. The project concentrates in studies of ice-induced vibrations of offshore structures. New full-scale data on vibrations of vertical as well as conical structures is availalable in the Publications-page.

VIBRA (Ice Induced Vibrations of Marine Structures) is an experimenal study supporting the projects ARKI and NEST. Tests were made in the ARCTECHLAB at the Hamburg Ship Model Basin in 2002 using a test structure that was sensitive to ice-induced vibrations. The work was financially supported by the Human Potential and Mobility Programme from the European Union through contract HPRI-CT-1999-00035. The test report and conference papers describing the tests are available in the Publications-page.

ISO/TC67/SC7/WG8 (Arctic Offshore Structures) is an international project, which aims at developing a new design code for structures in ice-bound waters. VTT participates in this work with a responsibility to lead a sub-goup that will define the recommended methods for ice load determination.


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